First, double-check your setup: These instructions will take you through the things you should check yourself: Package Files Not Working (http://www.simswiki.info/wiki.php?title=Game_Help:Installing_Sims_3_Package_Files/Not_Working). You may be able to fix the problem yourself using those instructions.

Still not working? Then we will need ALL of the following information.

What is the version of your base game and any/all expansions?
Windows OS: Game_Help:TS3_Patching_Find_Gameversion
Mac OSX: Game_Help:TS3_Patching_Find_Gameversion#info.plist

Copy and paste the indicated line from the skuversion.txt or info.plist from the following locations, for ALL games you have (adapt as appropriate for OSX):
C:\Program Files\Electronic Arts\The Sims 3\Game\Bin
C:\Program Files\Electronic Arts\The Sims 3 <EP or SP name>\Game\Bin
BG: GameVersion =
WA: GameVersion =
HEL: GameVersion =
AMB: GameVersion =
FL: GameVersion =
LN: GameVersion =
OL: GameVersion =
GEN: GameVersion =
TL: GameVersion =
Take THREE screenshots... one each of the following locations:

... and attach them to a post on this thread. Click Go Advanced and then Manage Attachments. Or if it says the pictures are too big, you can upload them to modyourpanties.com and copy and paste the links.
We have a guide on how to take screenshots if you need assistance: Game_Help:Screenshots.

Make sure you set your folder view to Details mode, that you have file types showing (.package, .cfg, etc. on the ends of the filenames) and expand out the Name and Type columns so they're fully readable!

First, double-check your setup: These instructions will take you through the things you should check yourself: Package Files Not Working (http://www.simswiki.info/wiki.php?title=Game_Help:Installing_Sims_3_Package_Files/Not_Working). You may be able to fix the problem yourself using those instructions.

Still not working? Then we will need ALL of the following information.

What is the version of your base game and any/all expansions?
Windows OS: Game_Help:TS3_Patching_Find_Gameversion
Mac OSX: Game_Help:TS3_Patching_Find_Gameversion#info.plist

Copy and paste the indicated line from the skuversion.txt or info.plist from the following locations, for ALL games you have (adapt as appropriate for OSX):
C:\Program Files\Electronic Arts\The Sims 3\Game\Bin
C:\Program Files\Electronic Arts\The Sims 3 <EP or SP name>\Game\Bin

... and attach them to a post on this thread. Click Go Advanced and then Manage Attachments. Or if it says the pictures are too big, you can upload them to modyourpanties.com and copy and paste the links.
We have a guide on how to take screenshots if you need assistance: Game_Help:Screenshots.

Make sure you set your folder view to Details mode, that you have file types showing (.package, .cfg, etc. on the ends of the filenames) and expand out the Name and Type columns so they're fully readable!